Apologies for taking so long. Here are some more photos for comparrison. I've made a bunch of measurements (sa accrately as I could) of the XT crank and put it in a word document but its too big to add as an attatchment so will try and send it in an e-mail. Most of the dimensions are the same, looks like just the rotor shaft and the cam chain gear which is different size, but the gear still has the same number of teeth (23).

Hope we find a match!